Sun visor for a helmet



FIG. 1 is a front side perspective view showing our new design for sun visor for a helmet;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view thereof shown on a reduced scale in condition of use with a helmet, it being understood that the broken line showing of a helmet is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for sun visor for a helmet, as shown and described. 